Fixing the pairing of tags/spaces

There is room for additional improvement like
-fixing additional spacing
-is <br></br> a valid combination? I'm not sure...

but the pages pass w3's validator and the pages render correctly.
Cleaning up the book reviews page.

Added helpful information on how to write book reviews.
Forgot to remove the 2nd title
Noticed DBL should be DBI

Search/Replaced DBL->DBI